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Diodes Incorporated DFLZ12Q-7
- Part No.:
- DFLZ12Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ12Q-7.pdf
- Description:
- DIODE ZENER 12V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
DFLZ12Q-7 from Diodes Incorporated is a 12 V, 1.0 W surface-mount power Zener diode in PowerDI123 package, rated for 100 mA test current (IZT), with 9.1 Ω typical Zener impedance (ZZT), ±5% voltage tolerance, and AEC-Q101 qualification for automotive applications. It provides precise voltage regulation in DC power rails, ESD protection clamping circuits, and overvoltage safeguarding in infotainment power supplies.
For engineers reviewing the DFLZ12Q-7 datasheet, DFLZ12Q-7 pinout, DFLZ12Q-7 application, or DFLZ12Q-7 equivalent, key selection criteria include Zener voltage accuracy at 100 mA, thermal resistance of 9 °C/W (junction-to-solder point), surge robustness via patented interlocking clip design, and RoHS-compliant, halogen-free "Green" construction suitable for high-reliability automotive PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with specified regulation at IZT = 100 mA and VR = 9.1 V (max reverse current IR = 3 µA). Its low RθJS = 9 °C/W enables efficient heat transfer from junction to solder joint on FR-4 PCBs, supporting continuous 1.0 W dissipation under defined layout conditions.
The device features a cathode-band polarity marking, matte tin–annealed copper leadframe terminals, and a molded green compound (UL 94V-0) case. It is qualified per AEC-Q101 Rev D for temperature cycling, humidity, and surge robustness - critical for engine control unit (ECU) and body electronics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V range at IZT = 100 mA - ensures tight regulation in 12 V automotive subsystems |
| Power Dissipation (PD) | 1.0 W on 1.5" × 1.5" FR-4 PCB with 2 oz Cu - defines maximum steady-state thermal load without derating |
| Zener Impedance (ZZT) | 1 Ω typical, ≤7 Ω max at IZT = 100 mA - determines AC ripple rejection and regulation stiffness |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-solder point - enables direct thermal modeling from die to PCB copper pad |
| Reverse Leakage (IR) | ≤3 µA at VR = 9.1 V - guarantees minimal standby current in always-on vehicle modules |
| Temperature Coefficient | +0.05 to +0.10 %/°C - indicates positive drift, requiring compensation in precision reference designs |
| Package | PowerDI123 - surface-mount outline with exposed cathode tab for thermal and mechanical anchoring |
Pinout & Package
Package: PowerDI123 - molded plastic case with large exposed cathode pad for thermal conduction and mechanical stability; UL 94V-0 rated; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in regulation mode; forms return path during reverse-bias operation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; soldered to thermal pad; carries full regulated current and dissipates heat directly to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Patented interlocking clip design | Enables 100 A surge capability per US Patent #7,095,113 - critical for load-dump transient suppression |
| AEC-Q101 qualification | Validated for automotive temperature cycling (-55°C to +150°C), HAST, and mechanical shock - supports PPAP release |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates without performance trade-offs |
| Exposed cathode thermal pad | Reduces RθJS to 9 °C/W - allows 1.0 W operation on standard FR-4 without heatsinks |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamp | Industrial PLC Input Protection Circuit |
|---|---|
Use Scenario: Clamps transients on 12 V supply rail during alternator load dump events in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as shunt regulator and voltage clamp. Use Value: Withstands 100 A surge per patent design and maintains 12 V regulation within ±5%, preventing microcontroller brownout. | Use Scenario: Protects 24 V digital input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff Zener in parallel with optocoupler input to limit voltage during overvoltage faults. Use Value: Low ZZT (1 Ω typ) ensures fast clamping response; AEC-Q101 reliability extends field lifetime beyond 15 years. |
| Automotive Infotainment System Voltage Reference | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Provides stable 12 V reference for audio amplifier biasing and display backlight drivers in head units. IC Role / Device Role / Timing Role: Precision Zener used as local voltage reference in analog signal chain. Use Value: Tight 11.4–12.7 V tolerance and +0.05/+0.10 %/°C TC enable stable bias under cabin temperature swings (-40°C to +85°C). | Use Scenario: Ensures clean power-up sequencing for FPGA-based imaging subsystems by regulating auxiliary 12 V rail. IC Role / Device Role / Timing Role: Shunt regulator maintaining voltage integrity during cold-start and battery-switchover transitions. Use Value: 1.0 W rating and 9 °C/W RθJS allow uninterrupted operation during 500 ms power dips without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | 0.3 W rating, SOT-23 package, RθJA = 300 °C/W, no AEC-Q101 qualification | Suitable only for low-power consumer PCBs; not rated for automotive surge or thermal stress | Select only for cost-sensitive non-automotive prototypes with <300 mW load |
| MMSZ5242B-TP | 0.5 W rating, SOD-123 package, ZZT = 30 Ω max, no interlocking clip or surge certification | Limited to board-level ESD clamping; lacks load-dump immunity required in vehicle networks | Prefer for space-constrained IoT sensors where 12 V reference stability is secondary to footprint |
Compared with BZX84-C12LT1G and MMSZ5242B-TP, DFLZ12Q-7 delivers 3.3× higher power handling, 33× lower thermal resistance, and certified AEC-Q101 reliability - making it the sole choice for production automotive voltage regulation where thermal margin and surge survival are non-negotiable.
Availability
DFLZ12Q-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC input stages, infotainment power rails, and medical diagnostic equipment requiring stable component supply under extended temperature and surge stress.
Supply support for DFLZ12Q-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The DFLZ series belongs to Diodes' AEC-Q101-qualified power Zener portfolio, engineered specifically for automotive voltage regulation, transient suppression, and reference stability in harsh thermal and electrical environments.
FAQ
What is the maximum surge current DFLZ12Q-7 can withstand?
DFLZ12Q-7 is designed with a patented interlocking clip structure (US Patent #7,095,113) enabling a peak surge current of 100 A under standardized load-dump waveforms. This capability is validated per AEC-Q101 transient surge testing and is integral to its use in automotive 12 V systems where alternator-induced spikes exceed 100 V.
Is DFLZ12Q-7 compatible with lead-free reflow profiles?
Yes. DFLZ12Q-7 features a matte tin–annealed copper leadframe and is qualified for standard JEDEC J-STD-020 lead-free reflow profiles, including peak temperatures up to 260°C. Its PowerDI123 package has moisture sensitivity level 1, eliminating bake requirements prior to assembly.
How does the PowerDI123 package improve thermal performance over SOD-123?
The PowerDI123 package incorporates an exposed cathode pad that reduces junction-to-solder-point thermal resistance to 9 °C/W - 3× lower than typical SOD-123 Zeners (~30 °C/W). This allows full 1.0 W dissipation on standard FR-4 without external heatsinking, verified per 1.5" × 1.5" 2 oz Cu layout.
Can DFLZ12Q-7 replace DFLZ12Q in existing designs?
Yes. DFLZ12Q-7 is the tape-and-reel packaging variant of DFLZ12Q, sharing identical electrical, thermal, and mechanical specifications. The "-7" suffix denotes 3000-piece reel packaging per AEC-Q101 ordering conventions and requires no layout or schematic changes.
DFLZ12Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 7.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLZ12Q-7 FAQ
1.How can I place an order for DFLZ12Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ12Q-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DFLZ12Q-7 reliable?
The price and inventory of DFLZ12Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ12Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ12Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ12Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ12Q-7?
DFLZ12Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ12Q-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DFLZ12Q-7?
For technical support, including DFLZ12Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ12Q-7 requirements.
6.How does Aetrix verify that DFLZ12Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ12Q-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DFLZ12Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ12Q-7?
All DFLZ12Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ12Q-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DFLZ12Q-7 part is unused and in its original packaging.
Return procedure for DFLZ12Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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